What is the time period with which metric data is sent to CloudWatch when detailed monitoring is enabled on an Amazon EC2 instance?

What is the time period with which metric data is sent to CloudWatch when detailed monitoring is enabled on an Amazon EC2 instance?
A . 15 minutes
B . 5 minutes
C . 1 minute
D . 45 seconds

Answer: C

Explanation:

By default, Amazon EC2 metric data is automatically sent to CloudWatch in 5-minute periods.

However, you can, enable detailed monitoring on an Amazon EC2 instance, which sends data to CloudWatch in 1-minute periods

Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-cloudwatch.html